/Engine/Source/Runtime/Engine/Classes/GameFramework/PlayerController.h
Tell client to fade camera  bEnableFading - true if we should apply FadeColor/FadeAmount to the screen  FadeColor - Color to fade to  FadeAlpha - Contains the start fade (X) and end fade (Y) values to apply. A start fade of less than 0 will use the screen's current fade value  FadeTime - length of time for fade to occur over  bFadeAudio - true to apply fading of audio alongside the video
void ClientSetCameraFade ( bool bEnableFading, [FColor](API\Runtime\Core\Math\FColor) FadeColor, FVector2D FadeAlpha, float FadeTime, bool bFadeAudio, bool bHoldWhenFinished )